Convert toy.constant to memref.global

MLIR
1

Hi,
I have created one Bufferization pass on toy example, which will convert toy.constant to memref.global, But after emitting IR, the constant string mentioned inside double inverted comma, like "constant***" .
The Full IR looks like

module {
  memref.global "private" constant @"constant_\01" : memref<8xf64> = dense<[1.200000e+00, 2.100000e+00, 4.700000e+00, 1.900000e+00, 1.100000e+00, 2.900000e+00, 2.700000e+00, 7.500000e+00]>
  memref.global "private" constant @"constant_\00" : memref<8xf64> = dense<[1.300000e+00, 2.600000e+00, 4.200000e+00, 1.100000e+00, 1.900000e+00, 2.200000e+00, 2.500000e+00, 7.700000e+00]>
  func.func @main() {
    %alloc = memref.alloc() : memref<8xf64>
    %alloc_0 = memref.alloc() : memref<8xf64>
    %alloc_1 = memref.alloc() : memref<8xf64>
    %0 = memref.get_global @"constant_\00" : memref<8xf64>
    memref.copy %0, %alloc_1 : memref<8xf64> to memref<8xf64>
    %1 = memref.get_global @"constant_\01" : memref<8xf64>
    memref.copy %1, %alloc_0 : memref<8xf64> to memref<8xf64>
    affine.for %arg0 = 0 to 2 step 4 {
      %2 = affine.vector_load %alloc_1[%arg0] : memref<8xf64>, vector<4xf64>
      %3 = affine.vector_load %alloc_0[%arg0] : memref<8xf64>, vector<4xf64>
      %4 = poseidon.add %2, %3 : vector<4xf64>
      affine.vector_store %4, %alloc[%arg0] : memref<8xf64>, vector<4xf64>
    }
    toy.print %alloc : memref<8xf64>
    memref.dealloc %alloc_1 : memref<8xf64>
    memref.dealloc %alloc_0 : memref<8xf64>
    memref.dealloc %alloc : memref<8xf64>
    return
  }
}

When I studied the memref dialect, the first example is

// Private variable with an initial value.
memref.global "private" @x : memref<2xf32> = dense<0.0,2.0>

so how to solve this issue? Please help !!!

2

It’s not clear to me what is the issue here?

3

Thank you for the response.

Actually I was asking how to generate the string in the format: @"constant_0" and not like @"constant_\00" because when I am lowering it down to LLVM IR it is giving some error. I figure that I am passing the character 0 instead of string 0. If this is fixed, that would solve my problem.

4

Can you show your code that creates the memref.global op or the symbol name?

5

Thank you for the response.

Finally I have tried with

std::string pega  = "constant_";
static int pos_val = 0;
pega  = pega + std::to_string(pos_val);
pos_val ++;

passing pega to global op builder & that works fine . It is creating correct IR now.